body {
    background-color: #333;
}

.reg_div {
    width: 500px;
    height: 500px;
    border: 1px solid #333;
    border-radius: 5px;
    text-align: center;
    margin: 20px auto auto;
    background-color: #ffffff;
}

.reg_div p {
    padding: 30px 0px;
    font-size: 30px;
}

.reg_ul {
    width: 100%;
}

.reg_ul li {
    margin: auto;
    overflow: hidden;
    width: 100%;
    margin-top: 10px;
}

.reg_ul li span {
    float: left;
    width: 100px;
    text-align: right;
    display: inline-block;
    margin: auto;
    margin-left: 30px;
    margin-top: 10px;
}

.reg_ul li span.tip {
    margin: 6px 0 0 10px;
    width: 40px;
    text-align: left;
}

.reg_ul li input {
    float: left;
    width: 228px;
    height: 30px;
    border: 1px solid #333;
    border-radius: 3px;
    padding-left: 20px;
    outline: medium;
    margin-left: 10px;
}

.reg_ul li button {
    color: #ffffff;
    background-color: #333;
    font-size: 16px;
    padding: 10px 60px;
    outline: inherit;
    border-radius: 3px;
    cursor: pointer;
    margin: 10px auto auto;
}


.
